That path is on the catastral map, so it would have existed at some stage and still legally exists today. But I only verified that I could see the top and bottom and didn't try to follow that one myself, and transcribed it approx from the catastral map.

I'll have another attempt to find it early in the new year. Did you try from the top or from the bottom?

It is currently marked No visibility, but I'm happy for it to be deleted and I'll re-add if and when I actually find it.